Rotor for centrifugal pumps.



No. 892,262. PATENTED JUNE so, 1908.

o. E. JAEGER. RoToE EOE GENTEIEUGAL PUMPS.

APPLICATION FILED FEB. 7, 1908.

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CAF-L HERMANN JAEGER, OF LEIPZIG-LINDENAU, GERMANY.

s ROTOR FOR CENTRIFUGAL PUMPS.

Specification of Letters atent.

Patented June 30, 1908.

Application mea Febrgary '1, 190s. sex-iai No. 414,198.

are provided with a side wall clamped to thel hub.

At high speeds wheels having inlets at one side only are unfavorably strained by only the one of the two sides being firmly connected with the hub, this being not possible with the second, since the necessary inlets are situated in it. Accordingly this latter wall is only a ring which at high speeds will expand more than the other side wall, the lat-- ter being iirinlyconnected with the hub or consisting ol' one piece with it, and therefore being more ca able of offering resistance to the centrifuga forces. The consequence of this une( ual straining or expansion, which is increased still more by the tangential forces of the blades, is that the diameter of the rotor is increased unequally in such a manner that the diameter of the one wall becomes greater than that of the wall which is capable of offering more resistance. Since the blades form a rigid connection between the two walls, however, the latter' cannot expand independently, and the consequence is that the more resisting wall 0r disk is bent in the manner indicated in Figure 1 in the drawing.

An important object of the present invention is to d o awav with this defect.

In order that the invention may be clearly understood reference is made to the accomanying drawing in which one embodiment 1s1 re resented by way of example, and in wnc Fig. 1 is a vertical section throng-h a wheel of a form customary hitherto, whereas Fig. 2 is a like view of a rotor in accordance with the present invention. i

Referring to the drawing, according to the present invention the wall (L is likewise separated from the hub, but so however that it has an equal or only slightly less internal diameter than the wall I). Consequently this wall a can now expand like the other und the tangential forces of the blades are transmitted uniformly to both walls.

For transmittingt the turning movement, the wall or disk o is clamped loosely with the hub, so that lit must participate in the rotation of the hub but can nevertheless expand e and contract radially.

Vliet I claim as my invention and desire to secure by Letters Patent is:---

l. 1n a rotor for centrifugal pun'ips, the combination with a hub, of :1n inipeller element having an annular wali :it one. side clamped loosely to said. hub so that said wall rotates with said hub and is free to movel radially on said hub by the tangential forces of the rotation thereof.

2. Vin a rotor for centrifugal pumps, the combination of a hub lixed on a shaft, a disli loosely attached to and adapted to be rotated by said hub, a second disk, and blades mounted between said disks, the attnclnnent of thefoi-nier disk to said hub beingsufliciently loose so that the disk can expand radially, for the purpose of both disks being strained approximately equally and 'preventing them being bent laterally.

In testimony whereof, I niiix my signature in the presence of two witnesses.

CARL HERMANN JAEGER.

W'itnesses:

v RUnoLPn FRICKE,

SOUTHARD P. WARNER. 

